EP 0379096 B1 19930414 - CONTROL DEVICE IN IMAGE FORMING APPARATUS
Title (en)
CONTROL DEVICE IN IMAGE FORMING APPARATUS
Publication
Application
Priority
JP 715789 A 19890114
Abstract (en)
[origin: EP0379096A1] Disclosed is a control device (2) in an image forming apparatus whose main body (1) is connected to one or more options through two-way serial lines comprising feeding and receiving lines (3, 4), which can determine whether the main body of the image forming apparatus and each of the options (5, 6, 7, 8) are not connected or not, or the power supply of the option is off or not on the basis of determination whether a signal level on the receiving serial line (4) is a reference level or less or more over a predetermined constant time period if a response signal from the option is not sent back to the main body and correspondingly, can automatically subject the option to suitable control processing.
IPC 1-7
IPC 8 full level
G03G 21/00 (2006.01); G03G 15/00 (2006.01); G06F 1/18 (2006.01); G06F 1/28 (2006.01)
CPC (source: EP US)
G03G 15/50 (2013.01 - EP US); G03G 15/55 (2013.01 - EP US)
Citation (examination)
- PATENT ABSTRACTS OF JAPAN, vol. 9, no. 161 (P-370)(1884), 5th July 1985 ; & JP-A-6037567 (CANON), 26.02.1985
- PATENT ABSTRACTS OF JAPAN, vol. 6, no. 179 (P-142)(1057), 4th September 1982 ; & JP-A-5793357 (RICOH), 10.06.1982
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
EP 0379096 A1 19900725; EP 0379096 B1 19930414; DE 69001301 D1 19930519; DE 69001301 T2 19930722; JP 2610332 B2 19970514; JP H02187776 A 19900723; US 4996562 A 19910226
DOCDB simple family (application)
EP 90100649 A 19900112; DE 69001301 T 19900112; JP 715789 A 19890114; US 46174890 A 19900108